[output] add table format support

[capcom6]

Summary by CodeRabbit

Release Notes

• New Features

  • Added a new table option to the CLI --format flag, rendering message state, logs, and webhook details in a structured, human-readable tabular layout (including relevant status and device information).

• Documentation

  • Updated the README “Output Formats” section and added a new Table example showing the expected columns and formatting.

• Improvements

  • Standardized how empty logs and webhooks are displayed for consistent “empty result” messaging.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 35c46e82-0d83-428e-9719-ecf5168826f2

📥 Commits

Reviewing files that changed from the base of the PR and between a055325 and 2b8ecb2.

📒 Files selected for processing (5)

• README.md
• cmd/smsgate/smsgate.go
• internal/core/output/output.go
• internal/core/output/table.go
• internal/core/output/text.go

📝 Walkthrough

Walkthrough

Adds a table output format to the CLI. A new TableOutput struct implementing the Renderer interface is introduced using text/tabwriter. The Format enum and New() factory are extended to include Table. An EmptyResult constant is extracted and shared with the existing TextOutput. The CLI flag help and README are updated accordingly.

Changes

Table Output Format

Layer / File(s)	Summary
Format enum, EmptyResult constant, and factory wiring internal/core/output/output.go, internal/core/output/text.go	Table is added to the Format constant block; a new exported EmptyResult = "Empty result" constant is introduced; New() gains a case Table routing to NewTableOutput(); text.go replaces hardcoded "Empty result" literals with the new constant.
TableOutput renderer implementation internal/core/output/table.go	New file defining TableOutput with NewTableOutput() and all five Renderer methods (MessageState, Logs, Webhook, Webhooks, Success) using text/tabwriter for column-aligned output, plus a compile-time interface assertion.
CLI flag help and README docs cmd/smsgate/smsgate.go, README.md	--format flag usage string updated to list table; README "Output Formats" section updated to four formats with a new Table example block.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'add table format support' directly and clearly describes the main change: introducing a new table output format to the CLI, which is evidenced by all file modifications.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[github-actions]

🤖 Pull request artifacts

Platform	File
🐳 Docker	GitHub Container Registry
🍎 Darwin arm64	smsgate_Darwin_arm64.tar.gz
🍎 Darwin x86_64	smsgate_Darwin_x86_64.tar.gz
🐧 Linux arm64	smsgate_Linux_arm64.tar.gz
🐧 Linux i386	smsgate_Linux_i386.tar.gz
🐧 Linux x86_64	smsgate_Linux_x86_64.tar.gz
🪟 Windows arm64	smsgate_Windows_arm64.zip
🪟 Windows i386	smsgate_Windows_i386.zip
🪟 Windows x86_64	smsgate_Windows_x86_64.zip

[capcom6]

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Full review finished.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@README.md`:
- Around line 414-417: The README.md webhook example table shows a `-` character
for a missing device ID, but the actual table renderer in
internal/core/output/table.go (around the DeviceID nil handling at lines
124-128) outputs an empty string instead. Update the README.md example table to
replace the `-` with an empty value (blank space) for the device ID field in the
second row to match what the renderer actually produces when DeviceID is nil,
ensuring the documentation example accurately reflects the actual output
behavior.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c58b8f97-f95d-4df1-8006-2eb704acfb43

📥 Commits

Reviewing files that changed from the base of the PR and between becb9b0 and 589dbd4.

📒 Files selected for processing (5)

• README.md
• cmd/smsgate/smsgate.go
• internal/core/output/output.go
• internal/core/output/table.go
• internal/core/output/text.go